JPH0956070A - Prediction controller, phase modification controller, and voltage-reactive power controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prediction controller which can suppress ineffective operations without deteriorating the control accuracy by using the predicted output value of an object to be controlled several minutes later. SOLUTION: A prediction controller is provided with an integration controller 11 which integrates the target value of the output of an object to be controlled or deviating amounts of the output from a dead zone and outputs the control signal of the object when the integrated value of the deviating amount exceeds a threshold, an output predicting device 12 which predicts the output of the object (x) minutes after from the time sequential data of the past output of the object, and a parameter adjusting device 14 which dynamically changes the threshold of the integrated value of the deviating amounts of the integration controller 11 depending upon the deviating state of the predicted output from the dead zone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integral control system such as voltage control of a power system (hereinafter abbreviated as a system), joint angle control of a robot arm, motor control of a machine tool, suspension control for a vehicle. The present invention relates to a predictive control device, an automatic phase control device, and a voltage reactive power control device.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a block diagram showing a conventional automatic phase control device installed in a V substation and used to maintain a 500 kV voltage value of the substation at a specified voltage value, where 1 is an integral control having an algorithm shown in the figure. A device 2 is an electric power system having a phase adjusting facility 3. This power system 2 includes, for example, a generator-side bus 5 and a load-side bus 6 to which the generators 4a and 4b are connected.
The transformers 7 are connected to each other via the transformer 7, and the phase adjusting equipment 3 is connected to the transformer 7.

Next, the operation will be described. Voltage detector 9
The actual voltage value (V) of the system detected by the method and its target value (Vref) and the upper and lower limit values (Vmax, Vmi) of the dead zone
n) is input to the integral control device 1. In this integral control device 1, the deviation amount of the voltage value from the dead zone is always integrated.

If (V> Vmax) E = ∫ (V−Vmax) dt else if (V <Vmin) E = ∫ (Vmin−V) dt else E = 0: (1)

The integral amount E is a preset threshold value (T
When the value exceeds h), a control signal for raising or lowering the phase adjusting equipment 3 is generated, and the phase adjusting equipment 3 is controlled, and at the same time, the integrated value (E) of the deviation amount is reset to zero. In addition,
When the integration amount (E) does not exceed the threshold value (Th), the integration operation is continued, and the integration amount is reset to 0 when the voltage value enters the dead zone.

If (E> Th) if (V> Vmax) Lowering of phase adjusting equipment; E = 0 else if (V <Vmin) Raising phase adjusting equipment; E = 0

An example of the result of simulating the voltage control using this automatic phasing algorithm is shown by a dotted line 112 in FIG. In this case, the target voltage value is 1.0 [PU], and the dead zone is the upper limit V.
max is 1.006 [PU] and lower limit Vmin is 0.99.
4 [PU], the threshold value of the deviation amount integral value is 10 [% seconds].

According to the above conventional apparatus, the integrated value exceeds the threshold value (Th) in the vicinity of about 1000 seconds, and the voltage value exceeds the upper limit value of the dead zone, so that the down signal of the phase adjusting equipment is output. , The phasing capacitor is released. This causes the voltage to drop, and the voltage is within the dead zone.

However, even if the phase adjusting equipment is not actually controlled, about 5 minutes after that, the solid line 1 in FIG.
When the voltage value is expected to fall within the dead zone as indicated by 11, the operation of the above-mentioned phase adjusting equipment 3 is not always necessary, and it can be said that the life of the phase adjusting equipment 3 is shortened.

In some cases, as shown in the vicinity of 2000 seconds in FIG. 11, since the phase adjusting equipment 3 is released, the voltage may drop more quickly than in the case where it is not released. Incidentally, as a method for predicting the voltage and performing control in such a case, Japanese Patent Laid-Open No. 6-59758 and Japanese Patent Laid-Open No. 6-59758 are available.
There are Japanese Patent Laid-Open No. 43947 and Japanese Patent Laid-Open No. 6-284577, but in both cases, correct operation cannot be expected when the error of the predicted voltage is large.

[0011]

Since the conventional automatic phase-adjustment control device is constructed as described above, the phase-adjustment equipment and the transformer tap in the automatic phase-adjustment control device have a wasteful control operation due to their durability. Need to be kept as low as possible. Further, there has been a problem that the amount of deviation from the preset dead zone needs to be suppressed as small as possible.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a predictive control device in which the control delay and the wasteful operation associated with the integral control are eliminated.
Further, it is intended to perform stable control correctly even when the output prediction error is large.

It is an object of the above predictive control device to perform a more accurate control operation by obtaining a predicted value of an output of a conventional control target which is close to the related art.

It is an object of the above predictive control device to carry out a more accurate control operation by always keeping the parameters of the output predicting device optimal.

It is an object of the present invention to obtain an automatic phase-adjustment control device which suppresses the operation of wasteful phase-adjustment equipment to extend the life of phase-adjustment equipment such as a capacitor and eliminates the control delay due to integral control.

It is possible to obtain a voltage reactive power control device that suppresses the operation of wasteful phasing equipment and transformer taps to extend the life of phasing equipment such as capacitors and transformer taps, and eliminates the control delay due to integral control. To aim.

[0017]

According to another aspect of the present invention, a predictive control device integrates a deviation of a controlled object output from a target value or a dead zone, and the integrated value of the deviation exceeds a threshold value. Using an integral controller that outputs a control signal of the controlled object at a time point and a mathematical method or a biological information processing method, predict the output of the controlled object x minutes later from the time-series data of the output of the past controlled object. The parameter adjusting device dynamically changes the threshold value of the integral value of the deviation amount of the integral control device, depending on whether or not the predicted output deviates from the dead zone.

A predictive control device according to a second aspect of the present invention predicts the output of the controlled object for every x, 2x ... Nx minutes, and the parameter adjusting device uses the combination of N predicted outputs to predict the output. The threshold value of the integrated value is dynamically changed.

A predictive control device according to a third aspect of the present invention integrates the deviation amount from the target value or the dead zone of the output of the controlled object, and controls the controlled object when the integrated value of the deviation amount exceeds a threshold value. An integral control device that outputs a signal, and an output prediction device that predicts the output of the controlled object x minutes later from time-series data of the output of the controlled object in the past by using a mathematical method or a biological information processing method. The dead zone adjusting device dynamically changes the dead zone of the integral control device depending on whether or not the predicted output deviates from the dead zone.

A predictive control device according to a fourth aspect of the present invention includes a preprocessing device that creates time series data of output values when it is assumed that the control device does not operate and supplies the time series data to the output prediction device. It was done.

In the predictive control device according to the fifth aspect of the present invention, in actual operation, the difference between the output of the controlled object at the current time and the output of the output predicting device a few minutes before is constantly monitored, and the difference is not less than a certain value. It is equipped with an output prediction monitoring device that adjusts the parameters of the output prediction device so that it does not occur.

According to a sixth aspect of the present invention, an automatic phase control apparatus integrates a deviation amount of a voltage of a power system from a dead zone, and when the integration amount exceeds a set threshold value, the phase adjusting equipment is operated. A voltage integration control device that outputs a control signal, and using time series data of past voltage values of the power system, a voltage prediction device that predicts a voltage value after a few minutes is provided, and the threshold adjustment device is the predicted voltage. The threshold value of the integrated value of the deviation amount of the voltage integration control device is dynamically changed depending on whether or not the value deviates from the dead zone.

According to a seventh aspect of the present invention, a voltage reactive power control apparatus integrates the deviation of the voltage of the power system and the reactive power from the dead zone, and adjusts when the integrated quantity exceeds a set threshold value. Predict the voltage value and reactive power several minutes later by using the voltage reactive power integration control device that outputs the control signal of the phase equipment and the transformer tap, and the time series data of the past voltage and reactive power value of the power system. With a voltage reactive power predicting device to, the threshold adjusting device, depending on whether the predicted voltage value and reactive power deviates from the dead zone,
The threshold value of the integrated value of the deviation amount of the voltage reactive power integral control device is dynamically changed.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. Embodiments of the present invention will be described below.
FIG. 1 is a block diagram showing the configuration of the predictive control device according to the first embodiment. Reference numeral 10 denotes a predictive control device. The predictive control device 10 includes an integral control device 11, an output predicting device 12, and a parameter adjusting device 13.
Outputs a control signal to the controlled object 14.

Next, the operation will be described. The inputs to the integral control device 11 are the output of the control target (for example, the designated busbar voltage value of the substation in the case of voltage control of the power system) and the target value, and the integration of the deviations of the above two inputs is performed. Outputs a control signal at the moment when exceeds the threshold value. The input to the output predicting device 12 is the output of the controlled object, the past time series data is created from this output in the internal buffer, and the output value of the controlled object after several minutes is predicted based on this time series data. And output it. The input to the parameter adjusting device 13 is the predicted output after a few minutes, which is the output of the output predicting device 12, and when the predicted output deviates largely from the target value, the parameter of the integral control device 11, for example, the threshold value T.
When h is made small to enable the control operation earlier, and when the predicted output approaches the target value, on the contrary, the threshold is increased to suppress the control operation.

As described above, by dynamically adjusting the threshold value, which is a parameter of the integral control, it is possible to perform an early control operation when the deviation between the target value and the actual output increases rapidly, and control is not performed. If the deviation decreases, it is possible to suppress the control operation.

Embodiment 2 FIG. In the output predicting device 12, x, 2x ,. . . The voltage value in the uncontrolled state after Nx minutes is predicted, and the N voltage predicted values are input to the parameter adjusting device 13.

The parameter adjusting device 13 dynamically adjusts the threshold value by a combination of N predicted voltage values. That is, the absolute value of the voltage value after nx minutes is | V
(Nx) |, dead band width is Vth (= Vmax, min)
Then, the threshold value is dynamically changed according to the table shown in FIG.

Embodiment 3. FIG. 3 is a third embodiment of the present invention.
3 is a block diagram showing the configuration of a prediction control device according to FIG. 1
Reference numeral 0 denotes a predictive control device, and the predictive control device 10 includes an integral control device 11, an output predicting device 12, and a dead zone adjusting device 15.
The integral control device 11 outputs a control signal to the controlled object 14.

In the same manner as in the first embodiment, the actual voltage value of the power system, the target value thereof, and the dead zone upper and lower limit values are input to the integral control device 11 in the third embodiment.
The control signal for 4 is output. The output predicting device 12 predicts the voltage value after x minutes, as in the first embodiment.

The dead zone adjusting device 15 receives the predicted value of the voltage in the uncontrolled state after x minutes which is the output of the output predicting device 12, and adjusts the upper and lower limit values of the dead zone of the integral control device 11. .

As in the case of the first embodiment, the dead band upper and lower limit values of the dead band adjusting device are adjusted by determining the standard values of the dead band upper and lower limit values Vmax and min and the upper and lower limit values, respectively. As a result of the subsequent voltage prediction, when the voltage is in the dead zone, Vmax (Vmin) is exponentially approximated to the upper limit (lower limit) value. In addition, as a result of predicting the voltage after x minutes, if the dead zone is projected, Vmax
(Vmin) is exponentially approximated to the lower limit (upper limit) value.

As a result of predicting the voltage after x minutes by the above-mentioned adjustment method, the integral control device 11 widens the dead zone when the voltage is in the dead zone, and thus integrates the deviation amount of the voltage from the dead zone. The amount itself is reduced, the operation of the phasing equipment is temporarily delayed, and when the actual voltage value enters the dead zone, the control operation is suppressed, and the wasteful operation of the phasing equipment is suppressed.

If the voltage exceeds the dead band as a result of predicting the voltage after x minutes, the dead band width becomes narrower, so the deviation amount integral amount of the voltage from the dead band increases, and the actual voltage exceeds the dead band. If this state continues, the control operation will be performed earlier.

Embodiment 4 FIG. FIG. 4 is a fourth embodiment of the present invention.
3 is a block diagram showing the configuration of a prediction control device according to FIG. 1
Reference numeral 0 denotes a predictive control device, and the predictive control device 10 includes an integral control device 11, an output predicting device 12, and a parameter adjusting device 13, and the integral control device 11 outputs a control signal to the controlled object 14. Reference numeral 16 is a preprocessing device for generating an uncontrolled state in the output prediction device 12.

In the fourth embodiment, by predicting how the voltage value will change several minutes after assuming that the integral control device 11 does not operate and adjusting the threshold value of the integral control device 11, the predictive control operation is performed. Do.

FIG. 5 is an example in which an uncontrolled voltage is created based on the actual voltage of the system and the control signal, assuming that the integral control device 11 did not control. In the figure, 51 indicates a change in voltage value before voltage correction, and 52 indicates an uncontrolled voltage.
Reference numeral 53 indicates the input amount of the phase adjusting equipment.

For example, when the operation of the control device that influences the controlled object, that is, the operation of the phase adjusting equipment is known, the uncontrolled voltage can be calculated by the following method. That is,
By correcting the voltage (V) as in the following equation, the voltage (V ') in an uncontrolled state is obtained by removing the influence of the operation of the phase-modulating equipment.
Get.

V ′ (t) = V (t) −K · Sc (t−T) where Sc is the current input amount of the phase adjusting equipment and K is the sensitivity coefficient. In this example, 1/30 is used. There is. It should be noted that this value is assumed to be almost constant unless there is a large change in the system configuration. Further, T is the sample step width of control.

Embodiment 5. FIG. 6 shows a fifth embodiment of the present invention.
3 is a block diagram showing the configuration of a prediction control device according to FIG. 1
Reference numeral 0 denotes a predictive control device, and the predictive control device 10 includes an integral control device 11, an output predicting device 12, and a threshold value adjusting device 15.
Output to 4. Reference numeral 17 is a delay device for inputting a predicted voltage value and delaying and outputting the input signal by x minutes, and 18 is a signal obtained by delaying the voltage predicted value after x minutes which is the output of the delay device 17 by x minutes. It is an output prediction monitoring device that inputs the current output of the controlled object and corrects the parameters of the output prediction device 12. Further, the output prediction monitoring device 18 in the present embodiment has a built-in storage device that stores time series data of past voltages and a voltage prediction device for learning prediction parameters.

The operation of the fifth embodiment will be described below. As described above, the inputs to the output prediction monitoring device 18 are the predicted value of the current voltage performed x minutes ago and the current voltage value. If the difference between the two inputs is small, it is assumed that the voltage prediction is accurate. On the contrary, when the difference between both inputs is large, it is presumed that the voltage prediction is not accurately performed.

Therefore, in the output predictive monitoring device 18,
The deviation between both inputs is constantly calculated, and if this deviation exceeds the preset value, it is determined that the output prediction is not accurate, and the accumulated past voltage data is used for adjustment. After the completion, the adjusted meter is transferred to the voltage predicting device 12.

With the configuration of this embodiment, it is possible to detect a change in the form of the system or a change in the voltage characteristic due to a change in the load or the amount of power generation, and it is possible to perform accurate voltage prediction.

Embodiment 6. FIG. 7 shows a sixth embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of an automatic phase control device according to FIG.
This is a configuration in which a threshold adjustment device 20 is added.

The input to the voltage integration controller 21 is the measured voltage amount (V) of the system and the target value (Vre) of the system voltage.
f), upper and lower limit values (Vmax, Vmin) of the dead zone, and the output is a control signal for the phase adjusting equipment, for example, (0) /. Raise (1) /. Any one of lowering (-1) is output.

That is, in the voltage integration control device 21, as shown in the equation (1), the voltage value (V) that exceeds the dead band width.
For, the integral value (E) of the protruding voltage amount is obtained.
Further, when the integrated value (E) exceeds the threshold value (Th), if the voltage exceeds the upper limit value of the dead zone, the phase down equipment lowering command (-1) is set to the lower limit value of the dead zone. If it has not reached, it outputs a command to raise the phase adjusting equipment (+1), and otherwise outputs a control signal for maintaining the current state (0).

The input to the voltage predicting device 19 is the voltage value of the system, and the past time series data when the current time created by the internal buffer is t is created from this input voltage value. Based on, the voltage amount after q minutes is predicted and output. The voltage predicting device 19 predicts the voltage value after q minutes from the past time series data of the voltage value by using, for example, regression analysis or a neural network.

First, the case of performing regression analysis will be described. The voltage prediction is divided into two stages. As described above, the input to the voltage predicting device 19 is V (ti), V
(T−i) ² i = 0 ,. . . , P, and the output is V (t +
q).

First, using the above-mentioned time series data of the past voltage in the uncontrolled state that has been collected and pre-processed in advance.

[Equation 1] The coefficients ai and bi of the prediction formula are estimated by regression analysis.

Next, when actually predicting the voltage, the above-described pre-determined non-linear expression is subjected to the above-described pre-processing on the past time-series data of the actual voltage value to obtain the uncontrolled state. The voltage data is created and used as the input, and the voltage in the uncontrolled state after time q minutes is predicted as the output.

A method using a neural network will be described. FIG. 8 shows the configuration of a voltage prediction device using a neural network. In the figure, ○ indicates a neuron,
Arrows indicate connections between neurons. The time series data of the voltage is input to the input layer at the left end, the nonlinear operation is sequentially performed by the neuron, and the voltage after q minutes is output as the output of the neuron at the output layer at the right end.

That is, when the current time is t, the input data is V (t-i); i = 0 ,. . . , P, and the output is V (t + q), which is the same as in the linear analysis.

With respect to the above-mentioned input / output relationship, the coupling coefficient of the neural network is determined by using a method such as the backpropagation method (BP) based on the steepest descent method.

Next, when actually predicting the voltage, the above-mentioned preprocessing is applied to the past time series data of the actual voltage value to create and input the voltage data in the uncontrolled state to the neural network. Then, as its output, the voltage in the uncontrolled state after time q 1 is predicted.

Using a neural network in FIG. 9,
The example of the result of having estimated the voltage after 5 minutes is shown. In the figure,
Reference numeral 91 indicates the actual voltage value, and 92 indicates the predicted voltage value after 5 minutes.

The input to the threshold adjusting device 20 is the voltage predicted value in the uncontrolled state after q minutes which is the output of the voltage predicting device 19. If the predicted voltage value deviates from the dead zone, that is, if the voltage is predicted to deviate from the dead zone when the uncontrolled state is continued for q minutes, the threshold value is decreased.
Conversely, when the predicted voltage value is within the dead zone, the threshold value is increased.

This operation will be described with reference to the threshold value adjustment flowchart of FIG. This threshold adjustment flowchart is executed for each control sample step. That is, as a result of voltage prediction (step ST10-1), it is determined whether or not the predicted voltage is within the dead zone shown in FIG. 10 (b) (steps ST10-2 and ST10-3). Sets the target value of the threshold to the lower limit (step ST10-4). If it is included, the target value of the threshold value is set to the upper limit value (step ST10-5).
Next, the threshold Th at the current time is determined by the mathematical formula shown in the figure (step ST10-6).

The threshold Th is increased / decreased exponentially as shown in FIG. 10C, and gradually approaches the upper and lower limits of the threshold Th.

The control results of the sixth embodiment are shown in FIGS.
Will be described. In FIG. 11, 112 is an example of the voltage control result by the conventional automatic phase control device, and 111 is an example of the voltage control result by this embodiment.

In FIG. 12, reference numeral 121 is a fixed threshold value in the conventional automatic phase control apparatus (standard value of the threshold value in the threshold value adjusting apparatus of the present embodiment), and 122 is the adjusted threshold value by the apparatus of the present embodiment. Is. Reference numeral 123 is an integrated value of the dead zone deviation amount of the voltage.

In each parameter of FIG. 11 in the above control result example, the target voltage value is 1.0 [PU], the upper and lower limit values of the dead zone are 1.006 and 0.994 [PU], respectively. The lower limit value is 14.9 [% seconds], and the time constants (T1, T2) are 20, 50 [seconds], respectively. The past time-series data is 1 for the last 5 minutes.
Input was made every minute and the prediction time was set to 5 minutes.

11 and 12, in the conventional automatic phase control apparatus, the integrated value of the amount of deviation of the dead zone exceeds the threshold value in the vicinity of 1000 seconds, the control signal of the phase adjusting equipment is generated, and the phase adjusting capacitor is released. As a result, the voltage has dropped and is in the dead zone.

On the other hand, in the present embodiment, the voltage predicting device 19 predicts that the voltage value will enter the dead zone after 5 minutes in the vicinity of 1000 seconds, and the threshold adjusting device 20 exponentially increases the threshold value to the upper limit value. It is changing. Along with this, if the threshold value is fixed, it seems that the control operation was being performed 10
The control operation in the vicinity of 00 seconds is temporarily delayed, and the integration of the deviation amount is still continued. However, since the actual voltage value has entered the dead zone in the vicinity of 1250 seconds, the integration value is reset to 0 and the control signal is It is suppressed. The same phenomenon occurs near 3100 seconds.

From around 400 seconds, the threshold value adjusting device 20 predicts that the voltage value after 5 minutes will deviate from the dead zone.
The threshold is exponentially changed to the lower limit. Along with this, the control operation occurs in the vicinity of about 700 seconds, but if the threshold Th is fixed, it takes about 10 seconds until the control. The same thing occurs near 2300 seconds and 2500 seconds.

As a result of verifying the control example 27 patterns for one hour including the above control result example, the number of times of operation of the control device is 75 times in the conventional automatic phase control device, whereas the automatic phase control of the present embodiment is performed. With the equipment, it was possible to reduce the number of times by more than 10% by 65 times. Further, the control accuracy at this time was almost equal to 0.553 [%] in the conventional automatic phase adjusting control device, and 0.552 [%] in the automatic phase adjusting control device of the present embodiment.

The control accuracy is calculated by the following equation.

[Equation 2]

Embodiment 7 FIG. 13 is a block diagram showing the configuration of a voltage reactive power control device according to Embodiment 7 of the present invention, which is configured by a voltage reactive power integration control device 25, a voltage reactive power prediction device 26, and a threshold adjustment device 27. In order to perform integral control of the voltage V and the reactive power Q, the dead-voltage integral control device 25 has two-dimensionally arranged dead zones and thresholds as shown in FIG.

The voltage reactive power predicting device 26 predicts the voltage value V and the reactive power Q after x minutes in the uncontrolled state, and the threshold adjusting device 27 determines the predicted voltage and reactive power respectively. Voltage reactive power integral control device 2
Adjust the threshold value of 5. The respective prediction / adjustment algorithms are the same as those in the above-described embodiment, and detailed description thereof will be omitted.

[0069]

As described above, according to the first aspect of the invention, the parameter of the integral control device for outputting the control signal is adjusted according to the output prediction value predicted by the output prediction device. There is an effect that various control operations are suppressed, control accuracy is improved, and stable control operation is possible even when the prediction accuracy is not good.

According to the second aspect of the present invention, the parameter of the integral control device for outputting the control signal is adjusted by using the N predicted output values, so that the wasteful control operation is suppressed and the control accuracy is improved. There is an effect that can be further improved.

According to the third aspect of the invention, the dead zone of the integral control device for outputting the control signal is adjusted by the output predicted value predicted by the output prediction device, so that the wasteful control operation is suppressed, There is an effect that the control accuracy can be improved.

According to the fourth aspect of the present invention, since the time series data of the output value when it is assumed that the integral control device does not operate is created and supplied to the output predicting device, the integral control device It is possible to eliminate a sudden change in the output of the controlled object due to the operation, it is possible to accurately predict the output of the controlled object, and it is possible to accurately suppress the wasteful operation.

According to the invention of claim 5, in actual operation, the difference between the output of the controlled object at the current time and the output of the output predicting device a few minutes before is always monitored so that the difference does not exceed a certain level. Since the parameters of the output predicting device are adjusted, the parameters of the output predicting device can always be kept optimal, the prediction accuracy can be greatly improved, and wasteful operation can be suppressed more accurately. effective.

According to the sixth aspect of the invention, the parameter of the voltage integration control device for outputting the control signal is adjusted by the voltage prediction value predicted by the voltage prediction device. There is an effect that the wasteful control operation of the phase-modulating equipment can be suppressed and the life of the phase-modulating equipment can be extended without increasing the error of the actual voltage value of the system with respect to the control target value.

According to the seventh aspect of the invention, the parameter of the voltage reactive power integral control device for outputting the control signal is adjusted according to the voltage reactive power prediction value predicted by the voltage reactive power prediction device. , Suppress the wasteful control operation of the phase-modulating equipment and transformer taps and increase the life of the phase-modulating equipment without increasing the error of the actual reactive power value of the system with respect to the control target value of the voltage reactive power integral controller There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a prediction control device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of threshold value adjustment based on a voltage predicted value pattern according to the second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a prediction control device according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a predictive control device according to a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram in which voltage correction is performed by the predictive control device according to the fourth embodiment.

FIG. 6 is a block diagram showing a configuration of a predictive control device according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an automatic phase control device according to a sixth embodiment of the present invention.

FIG. 8 is a configuration diagram of a voltage prediction device using a neural network.

FIG. 9 is a characteristic diagram showing a voltage prediction result using a neural network.

FIG. 10 is a flowchart illustrating an operation of the automatic phase control device.

FIG. 11 is a characteristic diagram showing a control result by the automatic phase control device of the sixth embodiment.

FIG. 12 is a characteristic diagram showing a control result by the automatic phase control device of the sixth embodiment.

FIG. 13 is a block diagram showing the configuration of a voltage reactive power control device according to a seventh embodiment of the present invention.

FIG. 14 is an explanatory diagram of a voltage reactive power integration controller applied to a voltage reactive power controller according to a seventh embodiment.

FIG. 15 is a block diagram showing a configuration of a conventional automatic phase control device.

[Explanation of symbols]

11 integration control device, 12 output prediction device, 13 parameter adjustment device, 14 control target, 15 dead zone adjustment device, 16 pre-processing device, 18 output prediction monitoring device, 19
Voltage predicting device, 20, 27 threshold value adjusting device, 21 voltage integral control device, 25 voltage reactive power integral control device, 2
6 Voltage reactive power prediction device.

(72) Inventor Sumie Kyomoto 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) Inventor Tadahiro Goda 2-3-3, Marunouchi, Chiyoda-ku, Tokyo Sanryo Denki Incorporated (72) Inventor Yoshiaki Mino 3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (72) Inventor Tadashi Sato 3-3-22 Nakanoshima, Kita-ku, Osaka, Osaka Kansai Electric power company

Claims (7)

[Claims] 1. An integral control device which integrates a target value of an output of a controlled object or an amount of deviation from a dead zone and outputs a control signal of the controlled object when the integrated value of the amount of deviation exceeds a threshold, and a mathematical controller. Method or bio-information processing method,
Depending on the output predicting device that predicts the output of the controlled object after x minutes from the time-series data of the output of the past controlled object, and whether the predicted output deviates from the dead zone, the deviation amount of the integral control device A predictive control device comprising: a parameter adjustment device that dynamically changes a threshold value of an integrated value. 2. The output of the controlled object is x, 2x ... N.
The prediction control device according to claim 1, wherein prediction is performed for each x minutes, and the threshold value of the integrated value is dynamically changed by a combination of N prediction outputs in the parameter adjustment device. 3. An integral control device for integrating a deviation of a controlled object output from a target value or a dead zone, and outputting a control signal of the controlled object when the integrated value of the deviation exceeds a threshold value, and a mathematical controller. Method or bio-information processing method,
The dead band of the integral control device is moved depending on the output predicting device that predicts the output of the controlled object after x minutes from the time series data of the output of the past controlled object and whether the predicted output deviates from the dead band. Predictive control device equipped with a dead zone adjusting device that changes dynamically. 4. The preprocessing device according to claim 1, further comprising a preprocessing device that creates time-series data of output values on the assumption that the control device does not operate and supplies the time-series data to the output prediction device. The predictive control device according to any one of items 3. 5. In the actual operation, the difference between the output of the controlled object at the current time and the output of the output predicting apparatus a few minutes ago is constantly monitored, and the parameters of the output predicting apparatus are adjusted so that the difference does not exceed a certain level. The predictive control device according to claim 1, further comprising an output predictive monitoring device that operates. 6. A voltage integration control device for integrating the deviation amount of a voltage of a power system from a dead zone, and outputting a control signal of a phase adjusting facility when the integration amount exceeds a set threshold value, and a power system. Using time series data of past voltage values of
A voltage predicting device that predicts the voltage value after a few minutes, and a threshold value that dynamically changes the threshold value of the integrated value of the deviation amount of the voltage integration control device depending on whether or not the predicted voltage value deviates from the dead zone. An automatic phase control device equipped with an adjusting device. 7. A voltage for integrating a voltage of a power system and an amount of deviation of a reactive power from a dead zone, and outputting a control signal of a phase adjusting facility and a transformer tap when the amount of integration exceeds a set threshold value. Using the reactive power integration control device, time series data of the past voltage and reactive power value of the power system, a voltage reactive power prediction device that predicts a voltage value and reactive power after a few minutes, and a predicted voltage value and A voltage reactive power control device comprising: a threshold adjustment device that dynamically changes the threshold value of the integrated value of the deviation amount of the voltage reactive power integration control device depending on whether the reactive power deviates from the dead zone.